// license:BSD-3-Clause // copyright-holders:smf /* * PlayStation Root Counter emulator * * Copyright 2003-2011 smf * */ #pragma once #ifndef __PSXRCNT_H__ #define __PSXRCNT_H__ #include "emu.h" extern const device_type PSX_RCNT; #define MCFG_PSX_RCNT_IRQ0_HANDLER(_devcb) \ devcb = &psxrcnt_device::set_irq0_handler(*device, DEVCB_##_devcb); #define MCFG_PSX_RCNT_IRQ1_HANDLER(_devcb) \ devcb = &psxrcnt_device::set_irq1_handler(*device, DEVCB_##_devcb); #define MCFG_PSX_RCNT_IRQ2_HANDLER(_devcb) \ devcb = &psxrcnt_device::set_irq2_handler(*device, DEVCB_##_devcb); #define PSX_RC_STOP ( 0x01 ) #define PSX_RC_RESET ( 0x04 ) /* guess */ #define PSX_RC_COUNTTARGET ( 0x08 ) #define PSX_RC_IRQTARGET ( 0x10 ) #define PSX_RC_IRQOVERFLOW ( 0x20 ) #define PSX_RC_REPEAT ( 0x40 ) #define PSX_RC_CLC ( 0x100 ) #define PSX_RC_DIV ( 0x200 ) struct psx_root { emu_timer *timer; UINT16 n_count; UINT16 n_mode; UINT16 n_target; UINT64 n_start; }; class psxrcnt_device : public device_t { public: psxrcnt_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock); // static configuration helpers template static devcb_base &set_irq0_handler(device_t &device, _Object object) { return downcast(device).m_irq0_handler.set_callback(object); } template static devcb_base &set_irq1_handler(device_t &device, _Object object) { return downcast(device).m_irq1_handler.set_callback(object); } template static devcb_base &set_irq2_handler(device_t &device, _Object object) { return downcast(device).m_irq2_handler.set_callback(object); } DECLARE_WRITE32_MEMBER( write ); DECLARE_READ32_MEMBER( read ); protected: virtual void device_start(); virtual void device_reset(); virtual void device_post_load(); virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr); private: psx_root root_counter[ 3 ]; UINT64 gettotalcycles( void ); int root_divider( int n_counter ); UINT16 root_current( int n_counter ); int root_target( int n_counter ); void root_timer_adjust( int n_counter ); devcb_write_line m_irq0_handler; devcb_write_line m_irq1_handler; devcb_write_line m_irq2_handler; }; #endif